code: def test_central_longitude(lon):
      aitoff = ccrs.Aitoff(central_longitude=lon)
      other_args = {"a=6378137.0", "lon_0={}".format(lon)}
      check_proj_params("aitoff", aitoff, other_args)
  
      assert_almost_equal(
          aitoff.x_limits,
          [-20037508.3427892, 20037508.3427892],
          decimal=5,
      )
      assert_almost_equal(
          aitoff.y_limits, [-10018754.1713946, 10018754.1713946]
      )
  
file_path: cartopy/lib/cartopy/tests/crs/test_aitoff.py
imports: import numpy
  from numpy.testing import assert_almost_equal
  import pytest
  import cartopy.crs
  from .helpers import check_proj_params
label_desc: Use image node_id 6 for calling a global function with example usage: test_central_longitude(lon) without return types